The Most Common BMW N63B44TU Engine Problems

In 2012, production of the already familiar but improved engine began with the addition of TU. It was produced in Munich, and aluminum was again the main material for the cylinder block. The injector as a power supply system no longer surprised anyone.

The engine again had an appearance that looked like the letter V. Here again 8 cylinders were used, and 4 valves were also installed on each of them.

The piston stroke of 88.3 millimeters and the bore diameter of 89 millimeters remained unchanged. The compression ratio was still 10.

The engine volume of 4.4 liters looked very impressive. Its power was equal to 450 horsepower at 5500 rpm, and it has increased in comparison with previous versions.

The maximum torque has also increased and is now 650 Nm at the same 1750 rpm. The developers recommend using 95 or 98 gasoline to avoid problems and complex breakdowns in the future.

The Euro 6 environmental standard appeared in this engine. It continued to weigh 230 kilograms. Consumption on the highway was approximately 7 liters per 62 miles, at a mixed distance it was more than 9 liters, and in the city it almost reached the mark of 13 liters per 62 miles.

Oil was leaving at a speed of 1000 grams per 621 miles or less. And then the machine used 5W-30 or 5W-40 oil. 8 and a half liters of oil was simultaneously in the engine. Replacement is necessary after driving every 8-6,200 miles.

The engine had an operating temperature of about 110 degrees. Its tuning made it possible to increase the power to almost 600 horsepower, which was a very serious indicator.

N63B44TU engine specifications

Power, hp 449 – 450
Fuel type Gasoline AI-95
Volume, cm*3 4395
Maximum torque, N * m (kg * m) at rpm. 650 (66) / 4500
Fuel consumption, l/62 mil 8.6 – 9.4
Engine’s type V-shaped, 8-cylinder
Add. engine information Direct fuel injection
CO2 emissions, g/mil 189 – 197
Cylinder diameter, mm 89
Number of valves per cylinder 4
Maximum power, hp (kW) at rpm 449 (330) / 5500; 450 (331) / 6000
Supercharger Turbine
Start-stop system Yes
Compression ratio 10.5
Piston stroke, mm 88.3

N63B44TU engine Reliability And Main Advantages

Excellent modernization in 2012 helped to significantly improve this engine. He received his famous TU prefix, and for the first time the developers decided to use pistons with a completely different bottom. The latest connecting rods and a crankshaft were also used, which adjusted to the mode of operation of all systems.

The device was also made in order to create its own system that would change the lift height for the intake valves. It was similar to its predecessor, but effective and helped the engine evolve.

Fuel injection was designed for modern technology and was carried out directly. The compound camshafts received new improved phase and lift characteristics.

In addition, the system that was engaged in changing the VANOS gas distribution phases was significantly redesigned. The change limits in it were slightly increased, in the case of the release by 40 percent, and with the release by 10.

In previous versions, the cooling system was just started, so it then had a lot of disadvantages, and now it has been significantly improved and along with it the oil supply has been improved. The intake was improved only slightly, but the exhaust was left at the same level, its quality in the past suited the manufacturers.

The turbocharger pump wheel has become slightly larger and more comfortable. And the Bosch control system, which was already mentioned earlier, was the main discovery of this device.

BMW cars with the 50i index received this power plant, and their owners were very pleased. Sports turbo engine for X5M, X6M, The M5 and M6 were also based on this engine. Drivers rated this engine as very good.

N63B44TU engine Common Problems And Main Disadvantages

The huge oil consumption was due to the fact that the piston grooves were heavily coked and lost all their useful functions. At the same time, even engines with very low mileage could get such a problem. Overhaul in this case is simply necessary, the piston rings also need to be changed to the original ones.

Water hammer occurs at a time when the car has been idle for a long time, for example, in the winter in the garage. Bad injectors with piezo properties cause this problem to occur. And the developers changed these nozzles several times during the period of engine manufacture.

The latest version of such nozzles should completely prevent such troubles. Ignition has misfires. Candles that are intended for ignition can die at one moment. In this regard, the sports M series helps a lot, the candles of which are very suitable for this engine.

Oil consumption can lead to unplanned corrosion. The cylinder block in this case will no longer help and should be replaced. Unfortunate location of the turbines between the cylinders leads to a huge concentration of heat transfer, which is in the collapse.

And there are also the most important highways, through which oil is supplied to the turbine. Then the already familiar coking of pipes begins, the oil stops flowing and the turbines fail. A very hot microclimate will affect both cooling and vacuum tubes.

In order to use the engine correctly and without loss, it is necessary to constantly check its condition and go for maintenance. This method will help in due time to change critical nodes to new ones and avoid serious costs in the future.

This N63B44TU engine is installed on the following models:

  • BMW 6-Series (F06)
  • BMW 7-Series (G11, G12)
  • BMW 7-Series (F01)

N63B44TU engine Modifications

O1 is produced from 2012 to the present day. This modification has been revised and improved several times, as a result, it received an increase in the TU letters and the changes that were described in the previous sections.

Power in this case at 5500-6000 rpm will be equal to 450 horsepower. The maximum torque will peak at 2000-4500 rpm and will already receive 650 N * m, which will significantly add ride quality and dynamics to cars using these engines.

N63B44TU engine Chip tuning

The first and second Stage will help to significantly improve the power of this engine. Both of these steps involve regular flashing and downpipe replacement, which add up to about 60 horsepower in total.

And the dynamic performance of the car will increase for little money and allow the driver to get an even more powerful engine. Also, 20 horses can be given by installing modifications to the intake or intercoolers.

1 Star2 Stars3 Stars4 Stars5 Stars (3 votes, average: 5.00 out of 5)

Leave a Comment